Adjustable clamp



July 14, 193'1. H. 'Lx-:vlsoN 1,814,254

` ADJUSTABLE CLAMP Filed Aug. 9, 1929 2 Sheets-Sheet 1 INVENTOR @fry ev/son A TTOR NE YS July 14, 1931. H. LEvlsoN 1,814,254

` ADJUSTABLE CLAMP l Filed Aug. 9, 1929 2 Sheets-Sheet 2 IN VEN TOR A TTORNE Y Harry cv/30h Patented July 14, 1931 PATENT,E OFFICE HARRY LEVISON, OF SAN FRANCISCO, CALIFORNIA ADJUSTABLE CLAMP Application led August 9, 1929. Serial No. 384,716.

My invention relates to the mounting of printing plates such as electrotypes, stereotypes, zinc etchings, half tones or any other plate which is to be positioned on a support upon either wooden, composition or metallic blocks. Further, my invention relates to the securing of a plate within the usual means as a chase for mounting` an assemblyor form for printing in a press, in such a manner that the position of the mounted and secured plate can be varied within the chase or other means utilized for securing the assembly in a press, after the form has been substantially completed. More particularly, my invention relates to thev detachable mounting of the plate on a supporting block and to the positioning of the mounted plateI within a chase or other form retaining means. y

Printing plates have, heretofore, usually been permanently attached to the mounting blocks, or if they have been detached from the mounting blocks, the usual means provided for securing them to the blocks has been extremely complicated and undesirably expensive. After the plate was secured'. to the blocks, its position could not be changed relative to the other matter within the form, without undesirably effecting the whole set-up.

In general, it is the object of my invention to provide means whereby a printing plate position of the secured may be readily attached in a positive manner to a separate block and which will enable the plate to be positively determined and changed without varying the locking means utilized for positioning the plate in the chase. I

K Another object of my invention is the provision of means adapted to secure the plate toa block in combination with other means for varying the relationship between the plate securing means and the usual press furniture.

A further object of my invention' is the provision in combination with afchase, furniture, a block, means for securing the block within the cha-se, of means for simultaneously securing a printing rplate to the block and means for varying the position of the plate and block securing means with respect to the chase andfurniture. v

My invention possessesY other advantageous features, some of which withthe foregoing will be set forth at length in the following description of my invention. It is to be understood that I do not limit myself to the showing made by the description, as I may adopt various forms of my invention within the scope of the claims, which are to be accorded a range of equivalents consistent with the state of the prior art.

Referring to the drawings:

Figure l is a plan view of a chase, a printing plate, the clamping means by which the block and printing plate are simultaneously secured in position, and the means which' are utilized for varying the relative position of the block with respect to the chase.

Figure 2 is a view in transverse'section along the line 2-2 of Fig. 1.

Figure 3 is a plan view of the clamping means employed.

igure 4l is a section along the line 4 4 of Fig. 8, showing the construction of the clampingl means andl of a means for varying the position of theplate relative to the chase.

Figure 5 is a plan view of a chase, a printing plate, the means used for clamping the plate within the chase, and the varying the the chase,

means for $0 position kof the plate relative to after the plate has been secured and locked in positionwithin the chase.

Figure 6 is a transverse section along the line 6-6 of Fig. v5..

. Figure 7 is a view in side in section, of a form of the employed.

Figure 8 is a plan view of a base utilized conjunction with the clamping means.

igure 9 is a modification of the base utilized wi th the clamping means.

Briefly, my invention, may be characterized as comprising theprovision of means for adjusting the position of a printing plate within such a positioning device as a chase, after the chase has been locked. This adjusting means is conveniently provided in combination with the clip disclosed in my m0 (zo-pending application Serial Number elevation, partly clamping means 251,029J filed February 1, 1928, and entitled Clamping means for mounting printing plates.

In printing, it is desirable to secure a positioning of the printing plate Within the chase, in a very exact manner. Thus, in color Work, it is expedient that exact and true registry of the plate ,bie possible. Accordingly itiisdesirable that a variation of the position of the plate be possible'tvi'thin the chase. I-Ieretofore, :thisvar'iation has been effected by inserting and removing shims such as pieces of paper or metal 'from about the furniture or block used to position the plate. Such a method is more-"or less unexact and requiresy ajloosening-'ofjthe lockingneans, thusv releasingthe Whole set-up Within the chase.

In'mfy af `rement'ioned co-pending application, Ihave described the combination of a block'll, havinga groovejor channel 12 extending thereabou't, Which is adapted to receive and to engage ay projection or teat 13,

provided uponja clip 14. Theclip usually Y has an inwardly extending lip 16,' Whichis adapted to engage bevelled edge 17 provided upon the Vprinting plate, and is so formed that upon a movement ofthe clip parallel to theV plane of ithe printing plate, itfpositively securesV and positively engages the plate against the block. j,

In accordance vvith my invention, provide means for' adjusting the positionof the joined plate and block, after-they have been locked in position inthe chase by suitable locking meansv as4 quoins 18. Preferably, I form .this adjusting means by attaching a bolt21 to the clip so that the bolt is rotatableM with respect to the clip. This I have accomplished by forming a boss 22, Which isdeforinedinto a suitable aperture 23, provide'd in the clip.` The bolt is provided With a suitable head 24, adapted( to receive' a Wrenchor otheri means so that rotation of the bolt isreadilyv effected with respect to the clip. A' threaded base 26,*usually of a square shape, isv provided Whichis adapted to receivelthe bolt 21;.: In practice,gthe base is abut'ted against furniture 27, the clamp is engaged with the blocks and With the print; ing plate and the assembly is locked Within the chase by use of the quoins; Vhen it is fcund that the position of the plates is unsuitable and that a variation Within the limits provided the clamp is desirable, the alter-V nate loosening andl tightening of oppositely positioned clamps,l Will serve to move the printing'plate to the desired position;` This nioveineiit yis; accomplished yvithout .the loosening `of the qiioins and Without the dangerof'displ'acingV the other matter in v the form asftype, furniture, etc., from theirgenerally desired position. l

IAIn certain printing operations, itis sometimes desirable to position the plate anguing jobs`,"sucli` operations, which are time consuming because of the inexactness, are most'y undesirable. In the several figures, namely Figures 5 to 9 inclusive, I have illustrated a manner of` modifying my aforementioned clamp so thatit may be utilized to position unmounted printingplates ag'ngularly Within a chase'. In this connection-,I

have expediently employed a base-41, upon which is rotatably mounted a nut 42; This f nut is adapted to receive the bolt' 21 which is joined to the' clip so that the-plate can be both angularly and adjustabl'y positioned.

es I have illustratedv in Figs; 5 and 6, the clips With the bases I have just described, are positioned Within a ch'ase in combination with suitable furniture, in such a'- manner that the plate is 'angularly positionedV with respect to the chase, and so that it is at the saine time secured to the block upon which it is to be mounted. Angular displacement/of the several bases isprevented by theinser tion of suitable pieces' of furniture 44, in such a manner that thef side-'thrust-of-'fthe bases is Ydistributed to the chase.' o

By alternately loosening and' tightening the several clamping means', the-position of the printing plate Withinthechasecan'be varied to meet thel conditions'under which it is to be utilized, after the'i furniture,the printing plate and the clamp have all been positioned .and positively secured in theapproximate desired locationvwithinthe chase; In this manner, the mounting of the printing plate Within the chaseis accomplished so that thej plate is`not only. positively positioned very quickly,butits subseguentposition can be varied to meet exactlyV the conditions desired invoperation.l s

Thebase 41' is4 conveniently provided oiga metal strip, bent to enclose thenut. AThe swivel mounting of the`nut' with respect to the base, is eiiected by the position of p in's' 43', ithicliare'joined tothe 'nut' and *exteiidtherefrom intothe" base in' Whichl they' are' received inape'rtui'es".

The stresses' o'fsec'urin'g the jtl'a'tl-il viithiii the chase, and of psiticagf itpsitviy upon the base, are transmitted from *nut tothe base` largely bythe pins 4.8; some instances',I I have found it? desirablev to;x forni the nuts' L12in such'afmann'er that 'thelstress is transmitted, inr part*- at least; by .thef nut directly to theba-se 'I`hus,V in the form shown in Fig. 8, Ihave formedt thenutfvvith such an arcuate shape that the back 46 is ing means, and means for enabling movef adapted to wipe or rub the nut is rotated with If the pins 43 are loosely provided in the base,

the stress of the locking up will be trans- Se mitted directly through the nut into the base, the function of the pins then being only to hold the nut rotatably with respect to the base.

The variable positioning means of my invention may be modified to be useful with other types of plates such as those which are already mounted. In such an instance the clip may be omitted and the bolt 21 provided with a suitable face for engaging the m0unted plate, or the block upon which it is positioned, so that the plate may be readily varied within the form retaining means.

I claim:

l. As a new article of manufacture for use in securing .a printing plate to a block and for moving the secured plate and block to a desired position, a 'clip having an inwardly extending lip and an inwardly eX- tending projection spaced from said lip adapted to engage the block, and yadjustable means secured to said clip to move said secured block and plate simultaneously to the desired position.

2. As a new article of manufacture for use in securing a printing plate to a block and for moving said block and said secured printing plate to a desired position comprising securing means for detachably securing said nlate to the block, and adjusting means for moving said secured block and plate to the desired position.

3. As a new article of manufacture for use in securing a printing plate to a block and for moving the secured plate and block to a desired position, a clip adapted to enkgage the block to secure the printing plate detachably thereto, and screw means secured to said clip for moving said secured plate to the desired position.

4. As a new article of manufacture Vfor use in securing a printing plate to a block and for moving the secured plate yand block with respect to furniture, means for securing the plate detachably to the block, and means adapted to abut against said furniture and against said clip, said means being adapted to be moved to vary the position of said secured block and plate with respect to said furniture.

5. As a new article of manufacture, means for securing a printing plate to a block, .a base attached to said securing means, and means for adjusting said securing means with respect to said base.

6. As a new article of manufacture, means for detachably securing a printing plate to a block in a form, a separate base for'said securing means, said base being adapted to be contacted with furniture in form retainagainst the base, as Hl respect to the base. the base.

ent of said securing means with respect to In testimony whereof, I have hereunto t my hand.

HARRY LEVISON. 

